YOU SAID:

a murderer murdered someone in their bed and sold the bedsheet that became red

INTO JAPANESE

殺人者が自分のベッドで誰かを殺害し、赤くなったシーツを売った

BACK INTO ENGLISH

The murderer killed someone in his bed and sold the red sheets

INTO JAPANESE

殺人者は彼のベッドで誰かを殺し、赤いシーツを売った

BACK INTO ENGLISH

The murderer killed someone in his bed and sold the red sheets